On Fri, 5 Jul 2002, John Covici wrote:
> Could some kind person answer a few questions about the controls of
> the ice1712.
>
I hope so ;-) Which card do you actually have? My experience is limited to
the Hoontech SoundTrack DSP24 Value and I have yet to test the SPDIF
capabilities. However, I dived somewhat into the code. Hope it helped;-)
> I have the manual for the card and I use it with that other operating
> system all the time, but I cannot figure out how the alsa controls
> correspond.
>
> What I would like to do more specifically is playback through the
> spdiff out interface, set the sample rate to 44.100 khz, to record I
> have to set the clock and sample rate to spdiff and after recording
> is over set it back to internal. I usually want to record from the
> sp/diff input as well.
>
I don't know about the recording, but the selection of the source for the
SPDIF output and external/internal clock can be made in /etc/asound.conf.
You would have to create two versions of this file (it comes from alsactl
-store) for internal/external clock and load them in turn with alsactl
-restore (I have forgotten the flag to specify a filename, but it is in
the manpage). These settings are near the end of the file and the names
are "Multi Track IEC958 Master" for the internal/external clock setting
and "IEC958 Playback Route" for the selection of what to play on the SPDIF
output. You would have to set the Master setting to on/off in the two
config files and the Route to "Digital Mixer" to get the best control over
what happens.
There also is the ncurses based program alsamixer which lets you set the
volume for the SPDIF input, and I think it even lets you change the
internal/external clock master with the "mute" (m) switch, when the cursor
is on the appropriate column. If this is overkill for you, I also remember
to have switched things like that with amixer, but you would have to read
the manpage as the command line syntax is not truly intuitive.
Ciao,
Roland
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